Question 30Choose A, B, C or D as the best answer.The author’s main argument is that __________.

Question

BlackTom AI · Accepted Answer

Sustainable management of rising food production best captures the author's central claim because it summarizes the thesis that increased output must be balanced with long‑term environmental and social constraints.

1. Relevant knowledge points and concepts
- Main idea identification: an author's main argument is the overarching claim supported by evidence and examples.
- Sustainability: managing resource use so environmental, economic and social needs are met over time.
- Distinguishing thesis from details: specific problems (waste, single solutions) are supporting points, not necessarily the primary claim.

2. Step‑by‑step reasoning
- Step 1: Locate the thesis or topic sentence in the passage (usually near the introduction or conclusion). The thesis will speak broadly about the future of food production and how it should be approached.
- Step 2: Note supporting points (e.g., increased demand, environmental impacts, policy recommendations). If these supports focus on balancing production with resource limits, they point to a sustainability thesis.
- Step 3: Compare each option to the thesis you identified. The correct option should restate the thesis in concise form.

3. Calculations/intermediate steps
- No numerical calculations are required for this multiple‑choice reading question.

4. Why the correct answer is correct
- Option C (“The increase in food production must be managed sustainably.”) directly restates a broad, policy‑oriented thesis that explains both the problem (increase in production/demand) and the required approach (managed sustainably). This aligns with an authorial main argument that integrates causes, consequences and recommended approach.

5. Why the other options are incorrect
- A (“The future demand for food will be unsustainable.”) is too absolute and negative; it claims inevitability rather than recommending management.
- B (“The Australian food industry produces too much waste.”) is far narrower and specific; it could be a supporting detail but not the global main argument.
- D (“Food sustainability can be solved through alternative protein sources.”) proposes a single solution, whereas the main argument (as summarized in C) emphasizes managing increased production broadly and sustainably, not one exclusive fix.

6. Conclusion
The analysis shows option C best captures the author’s central thesis. Therefore the correct answer is: c. The increase in food production must be managed sustainably.

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